IFM Electronic AC402S Programming Manual page 203

SmartPLC SafeLine AC4S with fieldbus interfaces
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Start-up test
If with activated start-up test in the start state both input signals "ChanA" = TRUE and "ChanB" =
TRUE, the state machine first goes through a state cycle until both input signals simultaneously take
the value FALSE.
State / Description
ChanA = TRUE UND ChanB = TRUE UND StartupTest = FALSE
ChanA = TRUE UND ChanB = TRUE UND StartupTest = TRUE
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System events
Following system events start processing of the state machine of the logical device:

Start event after successful initialisation of the state machine (E_Start)
Following system events change the state machine of the logical device to the initialisation state
(S_INIT):

A reset signal generated in the safe application (E_ErrorReset)

AS-i input slaves: Communication and configuration errors
(→ S. 267)

Local inputs/outputs: Configuration and system errors
(→ S. 269)
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Timer events
Timers are started when a state is exited. When the timer has elapsed, a respective event is created.
This timer event is used by the event machine as condition for the transition to the next state. If one or
several timer events occur simultaneously, the event with the highest priority is processed.
The logical devices can evaluate the following times when the safe process signal is generated:
Designation Description

InvalidTime Time span within which the signal channels may have an invalid state
without the device changing into the locked error state.

Firmly set

SynchTime Time span within which the signal channels have to take the same
logical state.

Programmable by programmer

Time span within which the states of the signal channels have to be
StabilisingTime
stable to trigger a state change in the evaluation logic.

Programmable by programmer

ToleranceTime Time span within which the state FALSE is tolerated at one of the two
signal channels without switching-off or changing to the test state.

Programmable by programmer
Transition event
E_ChanAB_without Startup Test
E_ChanAB_with Startup Test
(→Error codes: Safe AS-i slaves
(→Error codes: Local I/O interface
Timer event
E_InvalTimeout
E_SynchTimeout
E_StabTimeout
E_TolTimeout
43102
43016
43011
Priority
1
2
3
4
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